Because it was a temporary class, Martin chose to continue to teach physics.

Last week, we explained the concepts of force and acceleration to them. Today, Martin first reviewed the knowledge of last week, and then suddenly thought of a famous question.

"Which one is heavier, ten-pound iron ball or ten-pound cotton?"

Martin asked as his eyes fell on his siblings.

"Of course... it's the same heavy!"

Clin subconsciously wanted to talk about iron balls, but he immediately reacted, so he changed his words.

Martin nodded with a smile, and then asked, "If I stand on the bell tower and throw these two things down together, which one will land first?"

"Iron ball!"

Clin said with certainty.

Rocky nodded as well.

When answering the question, Clint was more active, and Rocky was a little more restrained.

However, both sister and younger brother are obviously listening to the class with great care.

Because they can always respond accordingly to what Martin said.

"What if it was a one-pound iron ball and a ten-pound iron ball?"

When asked this question, Martin's smile even more.

Although I always felt that the smile on Teacher Martin's face was a little strange, but after frowning and analyzing, Clin said based on his feelings.

"It should be a ten-pound iron ball, after all, it must be a little heavier."

However, Rocky tilted his head and thought, without a direct answer.

Martin continued to ask Clin, smiling and said, "Then according to your theory, if I tie two iron balls together with a rope, wouldn't they fall faster?"

Clin was very smart and immediately realized that the problem was not as simple as thinking. She couldn't help but stick out her tongue, her beautiful eyebrows frowned slightly, and then she began to think.

According to what I said just now, if two iron balls are tied together, if one is fast and the other is slow, then the overall speed should be between the two.

As a whole, the two iron balls are heavier and their drop speed should be faster.

There is a contradiction among this.

This is how the experiment on the Leaning Tower of Pisa came from.

Galileo's experiment can be said to be deeply rooted in the minds of every student in the country of foodie. Anyone who has taken physics classes will not know this scientist.

Although his experiments were not necessarily done on the Leaning Tower of Pisa, they were undoubtedly very vivid.

Galileo also reflects the changes in modern scientists' way of thinking.

Now a series of basic concepts about motion, including the derivation of the relationship between acceleration and force, is also completed by him.

It can be said that he is one of the giants under Newton's feet.

Before him, most of the thoughts about natural philosophy remained in the brain, just like Clin now, when encountering problems depended on feelings.

The heavier the thing falls faster, the more reasonable it seems to be to those who have not received physical education.

But now... Clint and Rocky are already thinking.

Martin also sat quietly beside him, waiting for them to think.

This thinking process is actually exploring the essence of things, that is, transforming their worldview.

It is also beneficial to being young. At least some things are not deeply rooted and are easier to accept new ideas.

After all, Clin was still a little anxious. After thinking for a while, he shook his head, looking at Martin with a headache:

"Teacher, don't keep it in a silence. You must know the reason! Which one is falling faster?"

Martin ignored her and looked at Rocky, who was still frowning and thinking at the age of ten.

He then said slowly: "Actually, I told you the reason last week."

When Rocky heard Martin say this, he seemed to have thought of something and suddenly looked up at him:

“Acceleration?”

Martin nodded: "In fact, it is difficult to break the stereotypes in your mind by just talking and thinking. Even if I tell you the reason, it will remain on paper."

"So the best way is to let you see the results with your own eyes!"

Seeing the results with your own eyes, naturally Martin planned to do another experiment.

And we have to use this experiment to roughly calculate the gravity coefficient of this world.

However, it can only be considered a rough idea.

I think it will be quite different from the data on Earth.

Because the weight units used by the Gapher Empire are pounds, ounces.

One pound is equal to twelve ounces, and this delta conversion is very unfavorable for calculation.

There must be a difference between a pound here and a kilogram of the earth.

As for accurate mass unit kilograms and length unit meters, they can be calculated theoretically.

However, that involves the more complex Planck constant and the speed of light...

If conditions permit, Martin also wants to use tests to measure.

It would be best if the three constants could be calculated.

Because these three constants contain the most rooted mysteries of the universe.

But in this world without any industrial foundation and scientific research, everything is empty talk.

Although extraordinary power can make people stronger, it will also limit development to a considerable extent.

Especially these natural sciences.

Martin has no subjective idea of ​​promoting the progress of the times, and he is not so confident.

The development of science and technology on the earth is based on the long research of countless scientists.

Although he received higher education, he still knew how much he was compared to those famous scientists.

What's more, in this world, religion and belief are more complex, and God really exists.

Copernicus, who was beaten to be a heresy, is the lesson of the past.

He just wants to live a life of troubled times, and he will be satisfied if he can understand the world...

The topic goes back to experiment.

Both Clint and Rocky showed great enthusiasm for the experiments mentioned by Martin.

Martin asked the servant to prepare the things, but the servant couldn't understand what Martin meant. After a few minutes, he simply hurried in with the butler.

For them, the schoolwork of the young lady and the young master has always been the top priority and must not be neglected.

"Mr. Shelwin, are there any weights in the manor?"

Martin asked with a smile.

The housekeeper looked over fifties and had a grayish-white head.

He worked in the Earl's house for many years, was a trustworthy person and won everyone's respect.

Moreover, from beginning to end, the butler also provided Martin with great convenience under the instruction of the Earl, so in Martin's heart, he was also full of respect for the old butler.

Shelwin was obviously a little surprised when he heard Martin ask this, but then nodded: "Some, I have to compare it with the ones sent by Coretta every year."

This was not beyond Martin's expectations.

The Earl family operates luxury goods and often deals with various precious metals. Accurate quality calculation is of course necessary, and weights are indispensable.

"Then please help prepare some things."

"Teacher Martin, please give me some instructions!"

Shelwin said politely.

Martin nodded: "First of all, there are balances and weights, and there are some ropes. Don't be too strong, the lighter the better, and don't be elastic."

"Iron balls are a must. Of course, it is not necessary to have a spherical shape. There is also a stopwatch..."

When the butler left the room, he held a piece of paper in his hand, which was filled with various materials and needs.

While Mr. Hilvin was preparing the experimental materials, Martin continued to teach the two children.

"In the last class, I told you about the concept of acceleration..."

...
Chapter completed!